I occasionally have to work on some legacy Python code that is run by the Python 2.5 interpreter in production. I'd like to set my development environment up just like production, so I need to install the python2.5 family of packages.

Of course, I can install from source, but I'd really prefer to use packages unless there is absolutely no way to do it.

However, the 2.5 packages are not included in any of the apt sources that ship with 11.04. Where can I find Python 2.5 packages that are likely to work smoothly with Natty?